Gas path gas return control module and piston self-return glue gun

Abstract

The utility model provides an air path air return control module and a piston self-return glue gun, and relates to the technical field of gluing tools, the air path air return control module comprises a valve body, a sealing plug and a spring; under the air inlet working condition, the sealing plug slides towards one end of the valve body exhaust port under the pressure of air entering from the valve body air inlet, the spring is compressed, the sealing plug is matched with the inner side wall of the valve body to seal the valve body exhaust port, and meanwhile the valve body air inlet and the valve body air outlet are communicated. And under the exhaust working condition, the spring rebounds, and the sealing plug is pressed against the inner side wall of the end part of one end of the valve body air inlet, so that the valve body air inlet is closed, and meanwhile, the valve body air outlet is communicated with the valve body air outlet. The piston self-return glue gun comprises a vacuum generator and the piston self-return glue gun. The technical problems that an existing glue gun piston is complex in retreating operation, the service life of the glue gun is prone to being damaged, and glue spills easily are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of glue coating tools, in particular to an air circuit air return control module and a piston automatic return glue gun. Background Art

[0002] Glue guns are widely used as glue application tools. Among the existing glue guns, the most commonly used is a single-group pneumatic soft glue gun, whose pneumatic structure and basic working principle are as follows: Figure 1 As shown, the piston 2 is connected to the rubber push piece. When in use, the valve 3 is connected to the high-pressure gas. When the piston 2 moves forward, it can drive the rubber push piece to compress the rubber bag to complete the gluing.

[0003] However, the existing structure has the following problems:

[0004] After the glue application is completed, the front of the valve 3 is connected to the atmosphere through the damper 4. Since the front of the piston 2 is connected to the atmosphere, the piston 2 cannot automatically retract. The general method now is to use a portable tool to push the piston back, and then load a new plastic bag into the rubber cylinder 1 to prepare for the next glue application; or, after putting a part of the new plastic bag into the rubber cylinder 1, the glue gun and the plastic bag are hit together in the vertical direction against a workbench or other table surface, so that the plastic bag and the piston 2 return to the initial position under the action of gravity and inertia. Both methods are complicated to operate, and the second method also has the problem of seriously damaging the life of the glue gun, and the problem of glue overflow is also prone to occur when loading the plastic bag. Utility Model Content

[0005] The utility model aims to provide an air circuit return air control module and a piston automatic return glue gun to alleviate the above technical problems existing in the prior art.

[0006] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0007] In a first aspect, an embodiment of the utility model provides a gas circuit return air control module, including a valve body, a sealing plug and a spring;

[0008] Wherein: the valve body is hollow inside, and one end of the axial direction is provided with a valve body air inlet, the other end is provided with a valve body exhaust port, and the middle section side wall is provided with a valve body air outlet; a sealing plug is provided inside the valve body; a spring is provided inside the valve body, one end of the spring abuts against the sealing plug, and the other end of the spring abuts against the inner side wall of one end of the valve body exhaust port. Under the intake condition, the sealing plug slides toward one end of the valve body exhaust port under the pressure of the gas entering from the valve body air inlet, compresses the spring, and cooperates with the inner side wall of the valve body to close the valve body exhaust port and connect the valve body air inlet and the valve body air outlet. Under the exhaust condition, the spring rebounds and presses the sealing plug against the inner side wall of the end of one end of the valve body air inlet, thereby closing the valve body air inlet and connecting the valve body air outlet and the valve body exhaust port.

[0009] In the air return control module provided in this embodiment, it is more preferred that: the radial circumferential surface of the sealing plug contacts the inner wall of the valve body.

[0010] In the air return control module provided in this embodiment, it is more preferred that pipe joints are installed in the air inlet of the valve body, the air outlet of the valve body, and the air outlet of the valve body.

[0011] In a second aspect, an embodiment of the utility model provides a piston automatic return glue gun, comprising a glue cylinder, a piston, a switch assembly, a vacuum generator and an air return control module according to any one of the aforementioned embodiments.

[0012] Wherein: the piston is axially slidably arranged in the rubber cylinder, and the rear end of the rubber cylinder is connected to the valve body air outlet pipeline. The switch assembly includes a first switch and a second switch, the first switch and the second switch respectively include their own shells and drive cores, the shells are provided with a first vent and a second vent, the drive core can move relative to the shell to connect the first vent and the second vent in an open state, and block the first vent and the second vent in a closed state; the first vent of the first switch is connected to the valve body air inlet pipeline; one end of the vacuum generator is connected to the valve body exhaust pipeline, and the other end is connected to the first vent pipeline of the second switch; the second vent of the first switch and the second vent of the second switch are connected to the atmosphere through a vent pipe.

[0013] In the piston automatic return glue gun provided in this embodiment, it is more preferred that: the housing of the first switch is fixed or integrally connected with the housing of the second switch, and the second air vent of the second switch is connected to the second air vent of the first switch and is connected to the atmosphere through the same air pipe.

[0014] In the automatic return piston glue gun provided in this embodiment, it is more preferred that: the automatic return piston glue gun also includes a glue gun handle, and the glue cylinder is installed on the glue gun handle; the first switch, the second switch and the ventilation pipe connected to the atmosphere are all arranged inside the glue gun handle.

[0015] In the automatic piston return glue gun provided in this embodiment, it is more preferred that: the first switch and the second switch are push switches respectively.

[0016] In the automatic piston return glue gun provided in this embodiment, it is more preferred that: the housing of the vacuum generator and the valve body of the air return control module are axially spaced and fixed to the side wall of the glue cylinder.

[0017] This embodiment can at least achieve the following beneficial effects:

[0018] This embodiment enables the glue gun to automatically return its piston to its original position after gluing under the action of the air return control module, so that a new plastic bag can be easily placed. The operation is simple and convenient, and the glue gun will not be damaged. It can also avoid glue overflow when the plastic bag is placed in the rubber cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the gas circuit structure diagram of the existing glue gun;

[0021] Figure 2 The overall structural diagram of the gas return control module provided by the embodiment of the utility model under the intake working condition, with the arrow indicating the gas flow direction;

[0022] Figure 3 The overall structural diagram of the gas return control module provided by the embodiment of the utility model under the exhaust working condition, the arrow indicates the gas flow direction;

[0023] Figure 4 The piston automatic return glue gun provided by the embodiment of the utility model is a schematic diagram of the overall structure in the glue application condition, and the arrow indicates the gas flow direction;

[0024] Figure 5 The piston automatic return glue gun provided by the embodiment of the utility model is a schematic diagram of the overall structure under the piston automatic return working condition, and the arrow shows the gas flow direction.

[0025] Icons: 1-rubber cylinder; 2-piston; 3-valve; 4-damper; 5-valve body; 51-valve body air inlet; 52-valve body air outlet; 53-valve body exhaust port; 6-sealing plug; 7-spring; 81-first switch; 82-second switch; 9-vacuum generator; 10-vent pipe; 11-glue gun handle. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that like reference numerals and letters denote similar items in the drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] Furthermore, the term "axial" does not imply that the components must be absolutely horizontal, but rather may be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] Glue guns are widely used as glue application tools. Among the existing glue guns, the most commonly used is a single-group pneumatic soft glue gun, whose pneumatic structure and basic working principle are as follows: Figure 1 As shown, the piston 2 is connected to the rubber push piece. When in use, the valve 3 is connected to the high-pressure gas. When the piston 2 moves forward, it can drive the rubber push piece to compress the rubber bag to complete the gluing.

[0034] However, the existing structure has the following problems:

[0035] After the glue application is completed, the front of the valve 3 is connected to the atmosphere through the damper 4. Since the front of the piston 2 is connected to the atmosphere, the piston 2 cannot automatically retract. The general method now is to use a portable tool to push the piston back, and then load a new plastic bag into the rubber cylinder 1 to prepare for the next glue application; or, after putting a part of the new plastic bag into the rubber cylinder 1, the glue gun and the plastic bag are hit together in the vertical direction against a workbench or other table surface, so that the plastic bag and the piston 2 return to the initial position under the action of gravity and inertia. Both methods are complicated to operate, and the second method also has the problem of seriously damaging the life of the glue gun, and the problem of glue overflow is also prone to occur when loading the plastic bag.

[0036] In contrast, the present embodiment provides an air return control module and a piston automatic return glue gun including the air return control module, so that the piston of the glue gun can automatically return to its original position after gluing under the action of the air return control module, and a new plastic bag can be easily placed. The operation is simple and convenient, and the glue gun will not be damaged. It can also avoid glue overflow when the plastic bag is placed in the rubber cylinder 1.

[0037] Specifically:

[0038] Reference Figure 2 and Figure 3The air return control module includes a valve body 5, a sealing plug 6 and a spring 7. The valve body 5 is hollow inside, and a valve body air inlet 51 is provided at one end of the axial direction, a valve body exhaust port 53 is provided at the other end, and a valve body air outlet 52 is provided on the middle side wall. The sealing plug 6 is provided inside the valve body 5; the spring 7 is provided inside the valve body 5, one end of the spring 7 abuts against the sealing plug 6, and the other end of the spring 7 abuts against the inner side wall of one end of the valve body exhaust port 53.

[0039] When working, the valve body air outlet 52 is connected to the working chamber;

[0040] like Figure 2 As shown, under the air intake condition, the sealing plug 6 slides toward one end of the valve body exhaust port 53 under the pressure of the gas entering from the valve body air inlet 51, compresses the spring 7, and cooperates with the inner wall of the valve body 5 to close the valve body exhaust port 53, while connecting the valve body air inlet 51 and the valve body air outlet 52. The gas enters from the valve body air inlet 51 and reaches the working chamber from the valve body air outlet 52.

[0041] like Figure 3 As shown, under the exhaust condition, the spring 7 rebounds and presses the sealing plug 6 against the inner wall of the end of one end of the valve body air inlet 51, thereby closing the valve body air inlet 51. At the same time, the valve body air outlet 52 and the valve body exhaust port 53 are connected, and the gas returns to the inside of the valve body 5 from the valve body air outlet 52, and is then discharged from the valve body exhaust port 53 to exhaust the gas in the working chamber.

[0042] It is more preferred but not limited to that the radial circumference of the sealing plug 6 contacts the inner wall of the valve body 5. It is more preferred but not limited to that pipe joints are installed in the valve body air inlet 51, the valve body exhaust port 53, and the valve body air outlet 52.

[0043] Reference Figure 4 and Figure 5 The piston automatic return glue gun includes a glue cylinder 1, a piston 2, a switch assembly, a vacuum generator 9 and the aforementioned air return control module.

[0044] Wherein: the piston 2 is axially slidably disposed in the rubber cylinder 1, and the rear end of the rubber cylinder 1 (the end facing the operator when applying glue) is connected to the valve body air outlet 52 through a pipeline. The switch assembly includes a first switch 81 and a second switch 82, and the first switch 81 and the second switch 82 respectively include their own housings and drive cores. The housings are provided with first air vents and second air vents, and the drive core can move relative to the housings to connect the first air vents and the second air vents in an open state, and block the first air vents and the second air vents in a closed state. Wherein, the first air vent of the first switch 81 is connected to the valve body air inlet 51 through a pipeline; one end of the vacuum generator 9 is connected to the valve body exhaust port 53 through a pipeline, and the other end of the vacuum generator 9 is connected to the first air vent of the second switch 82 through a pipeline; the second air vent of the first switch 81 and the second air vent of the second switch 82 are connected to the atmosphere through a vent pipe 10, and in order to save the space occupied by the switch assembly during installation and facilitate installation, it is preferably, but not limited to, such as Figure 4 and Figure 5 As shown: the housing of the first switch 81 and the housing of the second switch 82 are fixed or integrally connected together, and the second vent of the second switch 82 is connected to the second vent of the first switch 81 and is connected to the atmosphere through the same vent pipe 10.

[0045] When in use, the vent pipe 10 is connected to the glue gun air source;

[0046] like Figure 4 As shown, when glue is applied, i.e., the air intake condition of the valve body 5, the first switch 81 is turned on, the second switch 82 is in the closed state, and the high-pressure gas introduced from the air source flows along the vent pipe 10 - the first switch 81 - the air inlet 51 of the valve body - the air outlet 52 of the valve body - the internal path of the rubber cylinder 1, and finally pushes the piston 2 forward to apply glue;

[0047] like Figure 5 As shown, after the gluing is completed, that is, the valve body 5 is in the exhaust condition, the first switch 81 is closed, and the second switch 82 is opened, and the high-pressure gas introduced by the gas source enters the vacuum generator along the path of the vent pipe 10 - the second switch 82 - the vacuum generator, triggering the vacuum generator to work and generate negative pressure; under the negative pressure generated by the vacuum generator, the gas in the rubber cylinder 1 is pulled out along the path of the rubber cylinder 1 - the valve body outlet 52 - the valve body exhaust port 53 - the vacuum generator, and finally the piston 2 retreats to its original position (the piston automatically returns).

[0048] Therefore, the glue gun can automatically return its piston to its original position after glue application under the action of the air return control module, so that a new plastic bag can be easily placed. The operation is simple and convenient without damaging the glue gun, and glue overflow can be avoided when the plastic bag is placed in the rubber cylinder 1.

[0049] For ease of assembly, it is further preferred but not limited to that: the automatic piston return glue gun further comprises a glue gun handle 11, and the glue cartridge 1 is mounted on the glue gun handle 11; the first switch 81, the second switch 82 and the vent pipe 10 connected to the atmosphere are all arranged inside the glue gun handle 11. In addition, it is more preferred but not limited to that: the housing of the vacuum generator 9 and the valve body 5 of the air return control module are axially spaced and fixed to the side wall of the glue cartridge 1.

[0050] In addition, for ease of operation, it is more preferred that the first switch 81 and the second switch 82 are push switches respectively.

[0051] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A gas return control module, characterized in that: include: The valve body (5) is hollow inside, has a valve body air inlet (51) at one axial end, a valve body air outlet (53) at the other end, and a valve body air outlet (52) at the middle side wall; A sealing plug (6) is arranged inside the valve body (5); and a spring (7), which is arranged inside the valve body (5), one end of which abuts against the sealing plug (6), and the other end of which abuts against the inner wall of one end of the exhaust port (53) of the valve body; Under the air intake condition, the sealing plug (6) slides toward one end of the valve body exhaust port (53) under the pressure of the gas entering from the valve body air inlet (51), compresses the spring (7), and cooperates with the inner side wall of the valve body (5) to close the valve body exhaust port (53) and connect the valve body air inlet (51) and the valve body air outlet (52); Under exhaust conditions, the spring (7) rebounds and presses the sealing plug (6) against the inner wall of the end of one end of the valve body air inlet (51), thereby closing the valve body air inlet (51) and connecting the valve body air outlet (52) and the valve body air exhaust (53).

2. The gas return control module according to claim 1, characterized in that: The radial circumferential surface of the sealing plug (6) contacts the inner wall of the valve body (5).

3. The gas return control module according to claim 1, characterized in that: Pipe joints are installed in the valve body air inlet (51), the valve body air outlet (53), and the valve body air outlet (52).

4. A piston automatic return glue gun, characterized by: It comprises a rubber cartridge (1), a piston (2), a switch assembly, a vacuum generator (9) and an air return control module according to any one of claims 1 to 3; The piston (2) is axially slidably disposed in the rubber cylinder (1), and the rear end of the rubber cylinder (1) is connected to the valve body air outlet (52) pipeline; The switch assembly comprises a first switch (81) and a second switch (82), wherein the first switch (81) and the second switch (82) respectively comprise respective housings and drive cores, wherein the housings are provided with first vents and second vents, and the drive core is capable of moving relative to the housings to connect the first vents and the second vents in an open state, and to block the first vents and the second vents in a closed state; The first vent of the first switch (81) is in pipeline communication with the air inlet (51) of the valve body; One end of the vacuum generator (9) is in communication with a pipeline of the valve body exhaust port (53), and the other end is in communication with a pipeline of a first vent port of the second switch (82); The second vent of the first switch (81) and the second vent of the second switch (82) are connected to the atmosphere through a vent pipe (10).

5. The automatic piston return glue gun according to claim 4, characterized in that: The housing of the first switch (81) and the housing of the second switch (82) are fixed or integrally connected together, and the second vent of the second switch (82) and the second vent of the first switch (81) are connected to each other and to the atmosphere through the same vent pipe (10).

6. The automatic piston return glue gun according to claim 4, characterized in that: The automatic piston return glue gun further comprises a glue gun handle (11), and the glue cartridge (1) is mounted on the glue gun handle (11); The first switch (81), the second switch (82) and the vent pipe (10) connected to the atmosphere are all arranged inside the glue gun handle (11).

7. The automatic piston return glue gun according to claim 4, characterized in that: The first switch (81) and the second switch (82) are push switches respectively.

8. The automatic piston return glue gun according to claim 4, characterized in that: The housing of the vacuum generator (9) and the valve body (5) of the air return control module are axially spaced and fixed to the side wall of the rubber cylinder (1).

Images